Trolley.



PATENTED JUNE 30, 1903.

I. H. WALKER.

TROLLEY.

APPLIOATION FILED MAR. 14, 1902.

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A TTOHNE rs N0 MODEL.

WITNESSES: V

UNtTEo STATES Patented June 30, 1903.

PATENT OFFICE.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 732,144, dated June 30, 1903.

Application filed March 14, 1902. Serial Np. 98,249. (No model.) i

1'0 aZZ whom it may concern:

Be it known that I, JOHN HENRY WALKER, a citizen of the Uni ted States, and a resident of Lexington, in the county of Fayette and State structions and combinations of parts, as willv be hereinafter described and claimed.

In the drawings, Figure 1 is a side view, and Fig. 2 is an elevation, partly in section, of a wheel embodying my invention. Fig. 3 is a cross-sectional View on about line 3 3 of Fig. 2. Fig. 4 is a detail view showing the slotted construction at the end of the harpprongs. Fig. 5 is a detail view of one of the lubricating-boxes, showing the lug and pin thereon for entering the slot and opening in the harp-prong; and Fig. 6 is a detail sectional view on about line 6 6 of Fig. 1, showing the harp-prong and the lubricating-box with its lug fitted in the slot of the said prong.

The harp A has its prongs B spread apart at their front ends, and they are provided in their said front or free ends with slots B, through which the lubricating-boxes, with the connected parts, may be readily inserted in connecting the same with the harp. These lubricating-boxes have bearings for the axle of the trolleywheel and may be inserted bodily in the slots B, and when secured by the cap-nuts, presently described, to their re spective prongs and the opposite cap-nuts are connected by the tie-rod the wheel and the associated parts will be firmly held in the harp, as desired. The prongs Bare provided with the slots B, leading from their edges, and also with the perforations B the slots B receiving lugs G" on the lubricating-boxes C, and pins C on such boxes entering the openings B in the prongs B,as will be understood from Figs 1 and 2.

The wheel D has fixed in its center the tubular axle D, which makes contact at its opposite ends with the contact-plugs E, which are in the form of rings, as shown, and are held in close contact with the ends of the tubular axle D by the means presently described.

The boxes 0 are provided at their outer ends with the projecting tubulartenous 0 which are threaded externally to receive the cap-nuts F and whose bores are sufficiently large to receive the contact-plugs E, which fit in said bores, as shown in Fig. 2. At the inner ends of the bores of the said tenons the outer cup-section of the box 0 is provided with a rabhet or groove F, in which fits the inner section of the box 0, which section has the tubular central bushing portion C held at its outer end in the rabbet. F, and the inner face-plate G which fits at its outeredge in a groove 0 in the inner end of the outer tubular portion of the outer section of the box 0. Ithus make the box C with an outer or cup section and with an inner section, which latter com prises an inner face-plate and a central tublar portion held to the cup-section, the inner face-plate C being fitted at its outer edge to the cup-section and pressed in contact therewith hya few strokes of a hammer or otherwise to properly unite the parts. The tubular portion 0 has its bore grooved, it may be spirally, if preferred, and in the groove C so formed I supply graphite or similar material to insure lubrication of the pin D in case the oil should fail for any reason. This tube 0 has a' slot G. formed through it leading to the axle D, and a felt or other absorbent pad H fits in the oil-chamber I within the box 0 and has a tongue H passing through the slotG and into contact with the axle D, so the oil can be supplied by capillary action to the axle D. The wick-like portion ,I-I isheld in the slot G by means of a pin G,

as best shown in Fig. 3, so the said wick cannot be displaced. By this means oil supplied to the chamberI through the opening covered by the cap I can be fed evenly to the axle D as desired.

As shown in Fig. 2, the contact-ring E fits within the bore of the tubular tenon of the lubricating-box, and a short tube or thimble K bears against the said contact-plug and is pressed firmly thereagainst by the cap-nut F, which is threaded on the tenonC up against the harp-prong, as shown in the said Fig. 2, thus securing the box to the harp and also pressing the thimble K firmly against the contact-plug and holding the same in contact with the tubular axle of the wheel when the opposite cap-nuts are secured by the tie-rod L. This tie-rod L extends through the tubular axle D and through openings f in the capnuts F and receives the nuts L,whose heads seat in grooves f at the outer ends of the openingfand against gaskets L to prevent the wasting of oil.

When the parts are assembled as shown in Fig. 2, it will be noticed the lugs G prevent the boxes from rotating in the harp-prongs, while the pins C hold the said boxes securely in connection with the harp-prongs when the end nuts F are applied.

It will be noticed that the axle or journal is fixed in the trolley-wheel and revolves therewith and that the contact plugs or rings are pressed at all times firmly against the ends of the axle in such manner as to prevent the breaking of the circuit, so that I avoid the formation of arts resulting from the breaking of the current and which operate to rapidly destroy the wheels in the ordinary construction. It will also be noticed that the trolley-wheel will be firmly held in line and will not be permitted to tilt to either side, which is one of the greatest causes of the wheel leaving the wire, especially in rounding curves. It will also be noticed that the contact is made at the ends of the journal or axle carrying the Wheel without extra contact-springs and that the contact is held positively at all times at the ends of the journal. The felt wick H notonly aids in feeding the oil to the bearing, but prevents the oil from wasting by passing too rapidly to the hearing.

The axle D is usually held to the wheel by pressing it firmly into a central opening in the wheel by hydraulic or other pressure, so it can be readily renewed whenever desired.

As best shown in Fig. 2, the interior or bore of the thimble K is larger than that of the.

contact-ring, forming a cavity which may receive small particles of metal wearing from the ends of the journal or the other bearings.

It will be understood that the spring of the harp will press the contacts into electrical connection at all times.

Having thus described myinvention, what I claim as new, and desire to secure by Letters Patent, is

1. In a trolley the combination of the harpprongs having slots B and openings E the trolley-wheel having the axle, the boxes having bearings for the axle and provided at their outer ends with lugs to enter the slots B and pins to enter the openings B the nuts securing the boxes to their respective prongs, and a tie connection between the opposite nuts substantially as set forth.

2. The combination of the wheel, and its axle, the boxes having bearings for the axle, thecontact-rings fitting insaid boxes and against the ends of the axle, the harp, and means for securing the boxes to the harp subthe harp-prongs having slots for the lugs and openings for the pins of the boxes, the capnuts for securing the boxes to their respective prongs, and the tie-rod extending between the opposite cap-nuts substantially as set forth.

5. The combination with the boxes having bearings for the wheel-axle, and the contactrings fitting in said boxes, of the thimbles bearing against the outer sidesof said rings, the nut for pressing said thimbles against the ring, and theharp supporting the boxing substantially as set forth.

6. The combination of the wheel and its axle, the harp having a bearing for the boxing, the boxing having a bearing for the wheel-axle and provided with an outwardlyprojecting threaded tenon, the contact-ring bearing against the end of the axle, the thimble bearing against the'contact-ring, and the nut engaging the threaded tenon of the boxing and arranged to press the thimble against the contact-ring, substantially as set forth.

7. The combination with the harp having its prongs provided with end slots and with openings for the pins of the boxing, the wheel having tubular axle, the opposite boxes having projected end tubular tenons threaded on their outer sides and provided at the ends of said boxes with lugs and pins to enter slots and openings in the harp-prongs, said boxes being formed with the main or cup sections and with the inner sections having the end plates and the tubular bushings forming bearings for the Wheel-axle, the contact-rings bearing against the ends of the axle, the thimbles bearing against the contact-rings, the cap-nuts on the threaded tenons of the boxes,,and the tie-rod between the opposite cap-nuts substantiallyas set forth. v

8. The combination of the harp prongs, the wheel having an axle, the boxes on opposite sides of the wheel and having bearings for the axle, the end nuts for securing the boxes in connection with their respective harp-prongs, and a tie-rod between the opposite nuts substantially'as set forth.

9. The combination of the harp-prongs, the- JOHN HENRY WALKER.

Witnesses:

SoLoN O. KEMON, PERRY B. TURPIN.

Ioo 

